<template>
  <el-dialog width="500px" title="员工导入" :visible="showExcelDialog" @close="$emit('update:showExcelDialog', false)">
    <el-row type="flex" justify="center">
      <div class="upload-excel">
        <input
          ref="excelUploadRef"
          class="excel-upload-input"
          type="file"
          accept=".xlsx, .xls"
          @change="uploadChange"
        >
        <div class="drop">
          <i class="el-icon-upload" />
          <el-button type="text" @click="getExportTemplate">下载导入模板</el-button>
          <span>将文件拖到此处或
            <el-button type="text" @click="uploadExcel">点击上传</el-button>
          </span>
        </div>
      </div>
    </el-row>

    <el-row type="flex" justify="end">
      <!-- update:props属性名，值 直接修改 .sync修饰符的属性值 -->
      <el-button size="mini" type="primary" @click="$emit('update:showExcelDialog', false)">取消</el-button>

    </el-row>

  </el-dialog>

</template>

<script>
import { exportTemplateAPI, uploadExcelAPI } from '@/api/employee'
import FileSaver from 'file-saver'

export default {
  props: {
    showExcelDialog: {
      type: Boolean,
      default: false
    }
  },
  methods: {
    async getExportTemplate() {
      const blobFile = await exportTemplateAPI()
      FileSaver.saveAs(blobFile, '员工导入模版.xlsx')
      this.$message.success('模板下载成功~')
    },
    uploadExcel() {
      // 1. 触发上传文件标签的点击事件
      this.$refs.excelUploadRef.click()
    },
    async uploadChange(e) {
      console.log(e.target.files)
      // 1. 获取文件对象数组
      const files = e.target.files
      // 2. 判断
      if (files.length > 0) {
        // 2.1 取出第一个文件对象
        const file = files[0]
        // 2.2 创建一个FormData对象
        const fd = new FormData()
        fd.append('file', file)
        // 2.3 调用接口
        try {
          await uploadExcelAPI(fd)
          this.$message.success('上传成功')
          // 通知父组件关闭弹层
          this.$emit('update:showExcelDialog', false)
          // 通知父组件上传成功
          this.$emit('uploadSuccess')
        } catch (error) {
          this.$message.error('上传失败')
        } finally {
          this.$refs.excelUploadRef.value = ''
        }
      }
    }
  }
}
</script>

<style scoped lang="scss">
.upload-excel {
    display: flex;
    justify-content: center;
    margin: 20px;
    width: 360px;
    height: 180px;
    align-items: center;
    color: #697086;

    .excel-upload-input {
        display: none;
        z-index: -9999;
    }

    .btn-upload,
    .drop {
        border: 1px dashed #dcdfe6;
        width: 100%;
        height: 100%;
        text-align: center;
        line-height: 160px;
        border-radius: 8px;
        display: flex;
        flex-direction: column;
        justify-content: center;
    }

    .drop {
        line-height: 40px;
        color: #bbb;

        i {
            font-size: 60px;
            display: block;
            color: #c0c4cc;
        }
    }
}
</style>
